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You searched for: subject:"REUSABLE LAUNCH VEHICLES"
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[image]Cryogenic pressure box - Rockwell panel test - NASA/Langley Research Center
Side view of skin turnbuckle and ring frame turnbuckle. Side view of anial actuators. Orthogonal view of panelin test cell without heater array. Front upper view of panel in test cell without heater array.
Keywords: REUSABLE LAUNCH VEHICLES -- SPACE SHUTTL
Downloads: 4
[image]Cryogenic pressure box - Rockwell panel test - NASA/Langley Research Center
Side view of skin turnbuckle and ring frame turnbuckle. Side view of anial actuators. Orthogonal view of panelin test cell without heater array. Front upper view of panel in test cell without heater array.
Keywords: REUSABLE LAUNCH VEHICLES -- SPACE SHUTTL
Downloads: 8
[image]Cryogenic pressure box - Rockwell panel test - NASA/Langley Research Center
Side view of skin turnbuckle and ring frame turnbuckle. Side view of anial actuators. Orthogonal view of panelin test cell without heater array. Front upper view of panel in test cell without heater array.
Keywords: REUSABLE LAUNCH VEHICLES -- SPACE SHUTTL
Downloads: 6
[image]Cryogenic pressure box - Rockwell panel test - NASA/Langley Research Center
Side view of skin turnbuckle and ring frame turnbuckle. Side view of anial actuators. Orthogonal view of panelin test cell without heater array. Front upper view of panel in test cell without heater array.
Keywords: REUSABLE LAUNCH VEHICLES -- SPACE SHUTTL
Downloads: 5
[texts]A Study of the Non-Thermal X-Ray Emission of Shell-Type Supernova Remnants - Allen, Glenn E
The term of the second year of the award is the period from March 15, 2001 to March 14, 2002. As was the specified goal of the second year, we analyzed the spatial and spectral X-ray data for several young supernova remnants. I published a paper about an analysis of the ROSAT, ASCA, and RXTE data for the supernova remnant SN 1006. A copy of this paper is enclosed. As described in the paper, we believe that we accurately modeled the nonthermal X-ray emission from the remnant...
Keywords: PROPULSION; REUSABLE LAUNCH VEHICLES; PROTOTYPES; ROCKET ENGINES
Downloads: 69
[image]LaRC cryogenic pressure boxpanel - NASA/Langley Research Center
Cryogenic pressure box panel (shown with and without the teek cryo insulation). Photographed in building 1293C.
Keywords: REUSABLE LAUNCH VEHICLES -- SPACE SHUTTL; Where -- Langley Research Center (LaRC)
Downloads: 3
[image]LaRC cryogenic pressure boxpanel - NASA/Langley Research Center
Cryogenic pressure box panel (shown with and without the teek cryo insulation). Photographed in building 1293C.
Keywords: REUSABLE LAUNCH VEHICLES -- SPACE SHUTTL; Where -- Langley Research Center (LaRC)
Downloads: 3
[image]LaRC cryogenic pressure boxpanel - NASA/Langley Research Center
Cryogenic pressure box panel (shown with and without the teek cryo insulation). Photographed in building 1293C.
Keywords: REUSABLE LAUNCH VEHICLES -- SPACE SHUTTL; Where -- Langley Research Center (LaRC)
Downloads: 3
[image]LaRC cryogenic pressure boxpanel - NASA/Langley Research Center
Cryogenic pressure box panel (shown with and without the teek cryo insulation). Photographed in building 1293C.
Keywords: REUSABLE LAUNCH VEHICLES -- SPACE SHUTTL; Where -- Langley Research Center (LaRC)
Downloads: 6
[image]LaRC cryogenic pressure boxpanel - NASA/Langley Research Center
Cryogenic pressure box panel (shown with and without the teek cryo insulation). Photographed in building 1293C.
Keywords: REUSABLE LAUNCH VEHICLES -- SPACE SHUTTL; Where -- Langley Research Center (LaRC)
Downloads: 3
[image]LaRC cryogenic pressure boxpanel - NASA/Langley Research Center
Cryogenic pressure box panel (shown with and without the teek cryo insulation). Photographed in building 1293C.
Keywords: REUSABLE LAUNCH VEHICLES -- SPACE SHUTTL; Where -- Langley Research Center (LaRC)
Downloads: 3
[texts]Searching for Alien Life Having Unearthly Biochemistry - Jones, Harr
The search for alien life in the solar system should include exploring unearth-like environments for life having an unearthly biochemistry. We expect alien life to conform to the same basic chemical and ecological constraints as terrestrial life, since inorganic chemistry and the laws of ecosystems appear to be universal. Astrobiologists usually assume alien life will use familiar terrestrial biochemistry and therefore hope to find alien life by searching near water or by supplying hydrocarbons...
Keywords: REUSABLE LAUNCH VEHICLES; FLIGHT CONTROL; HYPERSONICS; ABORTED MISSIONS; SYSTEM FAILURES
Downloads: 108
[texts]Complex Correlation Kohn-T Method of Calculating Total and Elastic Cross Sections - Bhatia, A. K.
We report on the first part of a study of electron-hydrogen scattering, using a method which allows for the ab initio calculation of total and elastic cross sections at higher energies. In its general form the method uses complex 'radial' correlation functions, in a (Kohn) T-matrix formalism. The titled method, abbreviated Complex Correlation Kohn T (CCKT) method, is reviewed, in the context of electron-hydrogen scattering, including the derivation of the equation for the (complex) scattering fu...
Keywords: COMPOSITE STRUCTURES; FABRICATION; REUSABLE LAUNCH VEHICLES; TECHNOLOGY ASSESSMENT
Downloads: 83
[texts]Ultra High Voltage Propellant Isolators and Insulators for JIMO Ion Thrusters - Banks, Bruce A.
Within NASA's Project Prometheus, high specific impulse ion thrusters for electric propulsion of spacecraft for the proposed Jupiter Icy Moon Orbiter (JIMO) mission to three of Jupiter's moons: Callisto, Ganymede and Europa will require high voltage operation to meet mission propulsion. The anticipated approx.6,500 volt net ion energy will require electrical insulation and propellant isolation which must exceed that used successfully by the NASA Solar Electric Propulsion Technology Readiness (NS...
Keywords: REUSABLE LAUNCH VEHICLES; AIRCRAFT DESIGN; NUMERICAL ANALYSIS; SUPPORT SYSTEMS; LOGISTICS
Downloads: 127
[texts]Using Minimum-Surface Bodies for Iteration Space Partitioning - Frumlin, Michael
A number of known techniques for improving cache performance in scientific computations involve the reordering of the iteration space. Some of these reorderings can be considered as coverings of the iteration space with the sets having good surface-to-volume ratio. Use of such sets reduces the number of cache misses in computations of local operators having the iteration space as a domain. We study coverings of iteration spaces represented by structured and unstructured grids...
Keywords: RESEARCH AIRCRAFT; INVENTORIES; REUSABLE LAUNCH VEHICLES; REENTRY VEHICLES; FLIGHT TIME; HISTORIES; AIRSPEED; FLIGHT ALTITUDE
Downloads: 51
[texts]Thermal/Mechanical Response and Damage Growth in Polymeric Composites at Cryogenic Temperatures - Whitley, Karen S.
In order to increase the reliability of the next generation of space transportation systems, the mechanical behavior of polymeric matrix composite (PMC) materials at cryogenic temperatures must be investigated. This paper presents experimental data on the residual mechanical properties of a carbon fiber polymeric composite, IM7/PETI-5 both before and after aging at cryogenic temperatures. Tension modulus and strength were measured at room temperature, -196 C, and -269 C on five different specime...
Keywords: REENTRY TRAJECTORIES; TRAJECTORY OPTIMIZATION; REUSABLE LAUNCH VEHICLES; BOUNDARY VALUE PROBLEMS; HEATING; ALGORITHMS
Downloads: 74
[texts]Space Station Furnace Facility. Volume 2: Requirements definition and conceptual design study - NON
The Space Station Freedom Furnace (SSFF) Project is divided into two phases: phase 1, a definition study phase, and phase 2, a design and development phase. TBE was awarded a research study entitled, 'Space Station Furnace Facility Requirements Definition and Conceptual Design Study' on June 2, 1989. This report addresses the definition study phase only. Phase 2 is to be complete after completion of phase 1...
Keywords: COMPOSITE MATERIALS; MISSION PLANNING; REUSABLE LAUNCH VEHICLES; THERMAL PROTECTION; FLIGHT TESTS; GROUND TESTS
Downloads: 126
[texts]National Center for Advanced Manufacturing Overview - Vickers, John H
This paper presents a general overview of the National Center for Advanced Manufacturing, with an emphasis on Aerospace Materials, Processes and Environmental Technology. The topics include: 1) Background; 2) Mission; 3) Technology Development Approach; 4) Space Transportation Significance; 5) Partnering; 6) NCAM MAF Project; 7) NASA & Calhoun Community College; 8) Educational Development; and 9) Intelligent Synthesis Environment...
Keywords: SPACE TRANSPORTATION; SINGLE STAGE ROCKET VEHICLES; SPACECRAFT PROPULSION; REUSABLE ROCKET ENGINES; REUSABLE LAUNCH VEHICLES
Downloads: 105
[texts]Self-Ignition and Combustion of Gases - Sokolik, A. S
This paper attempts to state laws for the self-ignition and combustion of gases in a comprehensive manner.
Keywords: REUSABLE LAUNCH VEHICLES; DESIGN ANALYSIS; SYSTEMS ENGINEERING; SYSTEMS ANALYSIS; DATA MANAGEMENT; AUTOMATION; SCIENTIFIC VISUALIZATION
Downloads: 92
[texts]The New Jettison Policy for the International Space Station - Johnson, Nicholas L
During more than seven years of operations by the International Space Station (ISS), approximately three dozen pieces of debris were released and subsequently cataloged by the U.S. Space Surveillance Network (SSN). The individual mass of these objects ranged from less than 1 kg to 70 kg. Although some of these debris were separated from the ISS accidentally, some were intentionally cast-off, especially the larger items...
Keywords: REUSABLE LAUNCH VEHICLES; RELIABILITY; PAYLOADS; MAINTENANCE; LAUNCHING; LAUNCH VEHICLES; HEAT SHIELDING; LAUNCH COSTS; DETERIORATION; CONSTRUCTION
Downloads: 104
[texts]The Explorer's Guide to the Universe: A Reading List for Planetary and Space Science - NON
During the last decade, both scientists and the public have been engulfed by a flood of discoveries and information from outer space. Distant worlds have become familiar landscapes. Instruments in space have shown us a different Sun by the ''light'' of ultraviolet radiation and X-rays. Beyond the solar system, we have detected a strange universe of unsuspected violence, unexplained objects, and unimaginable energies...
Keywords: REUSABLE LAUNCH VEHICLES; ROCKET LININGS; DESIGN ANALYSIS; THRUST CHAMBERS; DEFORMATION; FAILURE; ROCKET ENGINE DESIGN
Downloads: 99
[texts]Dynamic Stall Measurements and Computations for a VR-12 Airfoil with a Variable Droop Leading Edge - Martin, P. B.
High density-altitude operations of helicopters with advanced performance and maneuver capabilities have lead to fundamental research on active high-lift system concepts for rotor blades. The requirement for this type of system was to improve the sectional lift-to-drag ratio by alleviating dynamic stall on the retreating blade while simultaneously reducing the transonic drag rise of the advancing blade...
Keywords: REUSABLE LAUNCH VEHICLES; TRAJECTORY PLANNING; BOUNDARY CONDITIONS; ALGORITHMS; FLIGHT PLANS; SIMULATION
Downloads: 77
[texts]Velocity Fields of Axisymmetric Hydrogen-Air Counterflow Diffusion Flames from LDV, PIV, and Numerical Computation - Pellett, Gerald L.
Laminar fuel-air counterflow diffusion flames (CFDFs) were studied using axisymmetric convergent-nozzle and straight-tube opposed jet burners (OJBs). The subject diagnostics were used to probe a systematic set of H2/N2-air CFDFs over wide ranges of fuel input (22 to 100% Ha), and input axial strain rate (130 to 1700 Us) just upstream of the airside edge, for both plug-flow and parabolic input velocity profiles...
Keywords: OPTIMIZATION; SIMULATION; RESOURCE ALLOCATION; OPERATIONS RESEARCH; GENETIC ALGORITHMS; REUSABLE LAUNCH VEHICLES; GROUND SUPPORT SYSTEMS; MISSION PLANNING
Downloads: 133
[texts]Power and On-Board Propulsion System Benefit Studies at NASA GRC - Hoffman, David J
This paper discusses the value of systems studies that provide unbiased 'honest broker' assessments of the quantified benefits afforded by advanced technologies for specific missions. The organization, format, and approach used by the NASA Glenn Research Center (GRC) Systems Assessment Team (SAT) to perform system studies for the GRC advanced power and on-board propulsion technology development program is described...
Keywords: MAINTAINABILITY; MODELS; OPERATING COSTS; RELIABILITY; COST ESTIMATES; REUSABLE LAUNCH VEHICLES; SYMBOLS
Downloads: 70
[texts]Maneuver Classification for Aircraft Fault Detection - Oza, Nikunj C.
Automated fault detection is an increasingly important problem in aircraft maintenance and operation. Standard methods of fault detection assume the availability of either data produced during all possible faulty operation modes or a clearly-defined means to determine whether the data provide a reasonable match to known examples of proper operation. In the domain of fault detection in aircraft, identifying all possible faulty and proper operating modes is clearly impossible...
Keywords: LAMINATES; PERMEABILITY; IMPACT TESTS; LEAKAGE; POLYMER MATRIX COMPOSITES; RESINS; REUSABLE LAUNCH VEHICLES; PROPULSION SYSTEM CONFIGURATIONS
Downloads: 80
[texts]The X-38 V-201 Flap Actuator Mechanism - Hagen, Jeff
The X-38 Crew Rescue Vehicle V-201 space flight test article was designed to achieve an aerodynamically controlled re-entry from orbit in part through the use of two body mounted flaps on the lower rear side. These flaps are actuated by an electromechanical system that is partially exposed to the re-entry environment. These actuators are of a novel configuration and are unique in their requirement to function while exposed to re-entry conditions...
Keywords: MANUFACTURING; COMPUTERIZED SIMULATION; CRYOGENIC TANKS; REUSABLE LAUNCH VEHICLES; OPTIMIZATION; SPACECRAFT LAUNCHING; LAUNCH VEHICLES; COSTS; COLLISIONS
Downloads: 168
[texts]Aerospace Medicine and Biology: A Continuing Bibliography with Indexes - NON
This supplemental issue of Aerospace Medicine and Biology, A Continuing Bibliography with Indexes (NASA/SP-1999-7011) lists reports, articles, and other documents recently announced in the NASA STI Database. In its subject coverage, Aerospace Medicine and Biology concentrates on the biological, physiological, psychological, and environmental effects to which humans are subjected during and following simulated or actual flight in the Earth's atmosphere or in interplanetary space...
Keywords: SPACE TRANSPORTATION; AIRCRAFT DESIGN; REUSABLE LAUNCH VEHICLES; TECHNOLOGY UTILIZATION; PROPULSION SYSTEM PERFORMANCE; COST ANALYSIS; RELIABILITY; MANUFACTURING
Downloads: 237
[texts]Upward Flame Spread Over Thin Solids in Partial Gravity - Feier, I. I.
The effects of partial-gravity, reduced pressure, and sample width on upward flame spread over a thin cellulose fuel were studied experimentally and the results were compared to a numerical flame spread simulation. Fuel samples 1-cm, 2-cm, and 4-cm wide were burned in air at reduced pressures of 0.2 to 0.4 atmospheres in simulated gravity environments of 0.1-G, 0.16-G (Lunar), and 0.38-G (Martian) onboard the NASA KC-135 aircraft and in normal-gravity tests...
Keywords: AERODYNAMIC HEATING; COMPUTER PROGRAMS; THERMAL PROTECTION; REUSABLE LAUNCH VEHICLES; NUMERICAL ANALYSIS
Downloads: 78
[texts]Design Concepts for Zero-G Whole Body Cleansing on ISS Alpha - Mohanty, Susmit
This document was originally published in 1997 as a International Space University Master of Space Studies student's project. While the specifics may be a little dated, the results gleaned are still relevant and valid. Johnson Space Center is now abuzz with preparations for the International Space Station. The work on the various systems for the U.S. Habitation Module will begin in 1998. As a prelude, the Flight Crew Support Division perceived the need to take a closer, more critical took at pla...
Keywords: AEROSPACE SYSTEMS; REUSABLE LAUNCH VEHICLES; SPACE TRANSPORTATION SYSTEM; CONTRACTS; SYSTEMS ENGINEERING; NASA PROGRAMS; GOVERNMENT/INDUSTRY RELATIONS
Downloads: 64
[texts]Reinforcement Learning in a Nonstationary Environment: The El Farol Problem - Bell, Ann Mari
This paper examines the performance of simple learning rules in a complex adaptive system based on a coordination problem modeled on the El Farol problem. The key features of the El Farol problem are that it typically involves a medium number of agents and that agents' pay-off functions have a discontinuous response to increased congestion. First we consider a single adaptive agent facing a stationary environment...
Keywords: SPACE TRANSPORTATION; SPACE SHUTTLES; MANNED SPACE FLIGHT; REUSABLE LAUNCH VEHICLES; NASA PROGRAMS; SAFETY; SPACE COMMERCIALIZATION
Downloads: 90
[texts]Research and Technology 1996 - NON
This report highlights the challenging work accomplished during fiscal year 1996 by Ames research scientists, engineers, and technologists. It discusses research and technologies that enable the Information Age, that expand the frontiers of knowledge for aeronautics and space, and that help to maintain U.S. leadership in aeronautics and space research and technology development. The accomplishments span the range of goals of NASA's four Strategic Enterprises: (1) Aeronautics and Space Transporta...
Keywords: CERAMIC MATRIX COMPOSITES; REUSABLE LAUNCH VEHICLES; COSTS; FABRICATION; SAFETY; THRUST CHAMBERS
Downloads: 365
[texts]Space programs summary no. 37-41, volume 2 for the period 1 July - 31 August 1966. The planetary-interplanetary program - NON
No Abstract Available
Keywords: AERODYNAMIC CHARACTERISTICS; REUSABLE LAUNCH VEHICLES; REUSABLE SPACECRAFT; TAKEOFF; LAUNCH VEHICLES; LIFT DRAG RATIO; REYNOLDS NUMBER; WIND TUNNEL STABILITY TESTS
Downloads: 147
[texts]Local Discontinuous Galerkin Methods for Partial Differential Equations with Higher Order Derivatives - Yan, Jue
In this paper we review the existing and develop new continuous Galerkin methods for solving time dependent partial differential equations with higher order derivatives in one and multiple space dimensions. We review local discontinuous Galerkin methods for convection diffusion equations involving second derivatives and for KdV type equations involving third derivatives. We then develop new local discontinuous Galerkin methods for the time dependent bi-harmonic type equations involving fourth de...
Keywords: COMPUTATIONAL FLUID DYNAMICS; PARALLEL COMPUTERS; AUTOMATIC CONTROL; INFORMATION MANAGEMENT; DISTRIBUTED PROCESSING; REUSABLE LAUNCH VEHICLES; DATA BASES; PROTOTYPES; MODULES
Downloads: 86
[texts]1999 NSREC Short Course: Proton Effects and Test Issues for Satellite Designers: Displacement Effects - Marshall, Cheryl J.
This portion of the Short Course is divided into two segments to separately address the two major proton-related effects confronting satellite designers: ionization effects and displacement damage effects. While both of these topics are deeply rooted in ''traditional'' descriptions of space radiation effects, there are several factors at play to cause renewed concern for satellite systems being designed today...
Keywords: COST REDUCTION; LAUNCHERS; ORGANIZATIONS; SPACE TRANSPORTATION; TELECOMMUNICATION; FINANCE; MARKET RESEARCH; REUSABLE LAUNCH VEHICLES; SPACECRAFT LAUNCHING; COMMERCE; HARDWARE; INCENTIVES; IRIDIUM
Downloads: 115
[texts]Aeroelastic Stability of a Four-Bladed Semi-Articulated Soft-Inplane Tiltrotor Model - Nixon, Mark W.
A new four-bladed, semi-articulated, soft-inplane rotor system, designed as a candidate for future heavy-lift rotorcraft, was tested at model scale on the Wing and Rotor Aeroelastic Testing System (WRATS), a 1/5-size aeroelastic wind-tunnel model based on the V-22. The experimental investigation included a hover test with the model in helicopter mode subject to ground resonance conditions, and a forward flight test with the model in airplane mode subject to whirl-flutter conditions...
Keywords: EARTH ORBITS; REUSABLE ROCKET ENGINES; REUSABLE SPACECRAFT; REUSABLE LAUNCH VEHICLES; CRYOGENIC ROCKET PROPELLANTS; SOLAR SAILS; AEROASSIST; NUCLEAR ELECTRIC PROPULSION
Downloads: 89
[texts]Fast Bound Methods for Large Scale Simulation with Application for Engineering Optimization - Patera, Anthony T.
In this work, we have focused on fast bound methods for large scale simulation with application for engineering optimization. The emphasis is on the development of techniques that provide both very fast turnaround and a certificate of Fidelity; these attributes ensure that the results are indeed relevant to - and trustworthy within - the engineering context. The bound methodology which underlies this work has many different instantiations: finite element approximation; iterative solution techniq...
Keywords: AEROSPACE ENGINEERING; SEALS (STOPPERS); CONFERENCES; PRODUCT DEVELOPMENT; NASA PROGRAMS; NUMERICAL ANALYSIS; MATERIALS SELECTION; TURBINE ENGINES; REUSABLE LAUNCH VEHICLES
Downloads: 52
[texts]Prediction of High-Lift Flows using Turbulent Closure Models - Rumsey, Christopher L.
The flow over two different multi-element airfoil configurations is computed using linear eddy viscosity turbulence models and a nonlinear explicit algebraic stress model. A subset of recently-measured transition locations using hot film on a McDonnell Douglas configuration is presented, and the effect of transition location on the computed solutions is explored. Deficiencies in wake profile computations are found to be attributable in large part to poor boundary layer prediction on the generati...
Keywords: TRANSATMOSPHERIC VEHICLES; REUSABLE LAUNCH VEHICLES; TARGETS; IMAGING TECHNIQUES; COMPUTER PROGRAMS; SPACE TRANSPORTATION SYSTEM FLIGHTS; SPACE SHUTTLES; NASA PROGRAMS
Downloads: 105
[texts]Acoustic Emission and Damage Accumulation for Various Woven C/SiC Composites Tested in Tension at Room Temperature - Morscher, Gregory
Modal acoustic emission (AE) has proven to be an excellent technique to monitor damage accumulation in ceramic matrix composites. In this study, AE was used to monitor tensile load-unload-reload hysteresis tests for a variety of C fiber reinforced, Sic matrix composites. C/SiC composites were reinforced with T-300 and IM7 fibers, had C, multilayer, or pseudo-porous C interphases, and had chemical vapor infiltrated Sic or melt-infiltrated SiC matrices...
Keywords: HIGH TEMPERATURE SUPERCONDUCTORS; THERMAL SHOCK; OXIDATION RESISTANCE; SHARP LEADING EDGES; FRACTURE STRENGTH; SHOCK RESISTANCE; DEFECTS; CERAMICS; REUSABLE LAUNCH VEHICLES; CONSTRUCTION
Downloads: 78
[texts]The Relative Reactivity of Deoxyribose and Ribose: Did DNA Come Before RNA - Dworkin, Jason P.
If it is assumed that there was a precursor to the ribose-phosphate backbone of RNA in the preRNA world (such as peptide nucleic acid), then the entry of various sugars into the genetic material may be related to the stability and non-enzymatic reactivity of the aldose. The rate of decomposition of 2-deoxyribose has been determined to be 1/3 that of ribose. In addition we have measured the amount of free aldehyde by H-1 and C-13 NMR and find that it has approximately 0.15 free aldehyde compared ...
Keywords: LOW EARTH ORBITS; LAUNCHING; GEOSYNCHRONOUS ORBITS; TETHERING; REUSABLE LAUNCH VEHICLES; PAYLOADS; COSTS; TRANSPORTATION; KINETIC ENERGY; ENERGY STORAGE
Downloads: 137
[texts]Cars Thermometry in a Supersonic Combustor for CFD Code Validation - Cutler, A. D.
An experiment has been conducted to acquire data for the validation of computational fluid dynamics (CFD) codes used in the design of supersonic combustors. The primary measurement technique is coherent anti-Stokes Raman spectroscopy (CARS), although surface pressures and temperatures have also been acquired. Modern- design- of-experiment techniques have been used to maximize the quality of the data set (for the given level of effort) and minimize systematic errors...
Keywords: FABRICATION; PANELS; THERMAL PROTECTION; CRYOGENIC FLUID STORAGE; CREEP ANALYSIS; LOADS (FORCES); REUSABLE LAUNCH VEHICLES; FINITE ELEMENT METHOD
Downloads: 74
[texts]Coordinated Fuel Cell System Programs for Government and Commercial Applications: Are We in a New Era - Warshay, Marvin
Though the fuel cell was invented in 1839, it was not until the early 1960's that the fuel cell power system was developed and used for a real application, for the NASA Space Mission Gemini. Unfortunately, fuel cell power systems did not, as a result, become in widespread use. Nevertheless, a great deal of progress has been made by both government and industry, culminating in many successful fuel cell power system demonstrations...
Keywords: TOTAL QUALITY MANAGEMENT; LAUNCHING; GROUND OPERATIONAL SUPPORT SYSTEM; SPACE SHUTTLES; QUALITY CONTROL; REUSABLE LAUNCH VEHICLES; SPACE TRANSPORTATION SYSTEM FLIGHTS
Downloads: 81
[texts]Flexible All-Digital Receiver for Bandwidth Efficient Modulations - Gray, Andrew
An all-digital high data rate parallel receiver architecture developed jointly by Goddard Space Flight Center and the Jet Propulsion Laboratory is presented. This receiver utilizes only a small number of high speed components along with a majority of lower speed components operating in a parallel frequency domain structure implementable in CMOS, and can currently process up to 600 Mbps with standard QPSK modulation...
Keywords: REUSABLE LAUNCH VEHICLES; EIGENVALUES; OPTIMAL CONTROL; STABILITY; DECOUPLING; ANGULAR VELOCITY; X-33 REUSABLE LAUNCH VEHICLE; LINEAR SYSTEMS; DIFFERENTIAL EQUATIONS; ERRORS
Downloads: 63
[texts]Deep Space Chronicle: A Chronology of Deep Space and Planetary Probes 1958-2000 - Siddiqi, Asif A
This monograph contains brief descriptions of all robotic deep space missions attempted since the opening of the space age in 1957. The missions are listed strictly chronologically in order of launch date (not by planetary encounter).
Keywords: NONDESTRUCTIVE TESTS; ROCKET ENGINES; REUSABLE LAUNCH VEHICLES; AUTOMATION; METALS; SPACECRAFT COMPONENTS; RELIABILITY; SPACE SHUTTLES; EDDY CURRENTS; DATA STORAGE
Downloads: 330
[texts]Solar Sail Models and Test Measurements Correspondence for Validation Requirements Definition - Ewing, Anthony
Solar sails are being developed as a mission-enabling technology in support of future NASA science missions. Current efforts have advanced solar sail technology sufficient to justify a flight validation program. A primary objective of this activity is to test and validate solar sail models that are currently under development so that they may be used with confidence in future science mission development (e.g., scalable to larger sails)...
Keywords: BIBLIOGRAPHIES; REUSABLE LAUNCH VEHICLES; SPACECRAFT PROPULSION; LAUNCH VEHICLES; CARGO; LOW EARTH ORBITS; SPACE STATIONS; PAYLOADS; SPACE TRANSPORTATION; RECOVERABLE LAUNCH VEHICLES
Downloads: 76
[texts]Fifty Years of Flight Research: An Annotated Bibliography of Technical Publications of NASA Dryden Flight Research Center, 1946-1996 - Fisher, David F
Titles, authors, report numbers, and abstracts are given for more than 2200 unclassified and unrestricted technical reports and papers published from September 1946 to December 1996 by NASA Dryden Flight Research Center and its predecessor organizations. These technical reports and papers describe and give the results of 50 years of flight research performed by the NACA and NASA, from the X-1 and other early X-airplanes, to the X-15, Space Shuttle, X-29 Forward Swept Wing, and X-31 aircraft...
Keywords: INTERNATIONAL SPACE STATION; ORBITAL SERVICING; REUSABLE LAUNCH VEHICLES; SPACE COMMERCIALIZATION; ECONOMIC ANALYSIS; DEFENSE PROGRAM; COST REDUCTION; MANAGEMENT PLANNING; OPERATING COSTS
Downloads: 366
[texts]GRB 021211 as a Faint Analogue of GRB 990123: Exploring the Similarities and Differences in the Optical Afterglows - Holland, Stephen T.
We present BVR(sub c)JHK(sub s) photometry of the optical afterglow of the gamma-ray burst GRB 021211 taken at the Magellan, MMT, and WIYN observatories between 0.7 and 50 days after the burst. We find an intrinsic spectral slope at optical and near-infrared wavelengths of 0.69 /- 0.14 at 0.87 days. The optical decay during the first day is almost identical to that of GRB 990123 except that GRB 021211's optical afterglow was intrinsically approximately 38 times fainter and the transition from th...
Keywords: CERAMICS; HYPERVELOCITY IMPACT; REUSABLE LAUNCH VEHICLES; THERMAL PROTECTION; TILES; SYSTEMS ENGINEERING; RAIN EROSION; HONEYCOMB STRUCTURES; HIGH TEMPERATURE GASES
Downloads: 203
[texts]Development of Thin Film Ceramic Thermocouples for High Temperature Environments - Wrbanek, John D.
The maximum use temperature of noble metal thin film thermocouples of 1100 C (2000 F) may not be adequate for use on components in the increasingly harsh conditions of advanced aircraft and next generation launch technology. Ceramic-based thermocouples are known for their high stability and robustness at temperatures exceeding 1500 C, but are typically found in the form of rods or probes. NASA Glenn Research Center is investigating the feasibility of ceramics as thin film thermocouples for extre...
Keywords: COMPUTERIZED SIMULATION; REUSABLE LAUNCH VEHICLES; OPTIMIZATION; MATHEMATICAL MODELS; GENETIC ALGORITHMS; DISCRETIZATION (MATHEMATICS); STOCHASTIC PROCESSES; STATISTICAL ANALYSIS; ACCURACY; COSTS
Downloads: 102
[texts]Simultaneous Laser Raman-Rayleigh-LIF Measurements and Numerical Modeling Results of a Lifted Turbulent H2/N2 Jet Flame in a Vitiated Coflow - Cabra, R.
An experiment and numerical investigation is presented of a lifted turbulent H2/N2 jet flame in a coflow of hot, vitiated gases. The vitiated coflow burner emulates the coupling of turbulent mixing and chemical kinetics exemplary of the reacting flow in the recirculation region of advanced combustors. It also simplifies numerical investigation of this coupled problem by removing the complexity of recirculating flow...
Keywords: REUSABLE LAUNCH VEHICLES; SPACECRAFT PROPULSION; SPACECRAFT LAUNCHING; NASA SPACE PROGRAMS; SPACECRAFT DESIGN; TECHNOLOGY UTILIZATION; COSTS; SAFETY; FLIGHT OPERATIONS; MISSION PLANNING
Downloads: 59
[texts]Cool Software for Hot Materials - NON
Deformation Control Technology, Inc. (DCT) used a NASA SBIR contract to develop a computer modeling system for evaluating thermal barrier coatings (TBCs) beforehand. Traditional tests of TBCs required Burner Rig tests, which involved the actual application of a coating to a surface. DCT's software reduces experimentation costs as well as led to a breakthrough in understanding the role of bond coat oxidization...
Keywords: SYSTEMS HEALTH MONITORING; AEROSPACE SAFETY; MANAGEMENT SYSTEMS; TECHNOLOGY ASSESSMENT; X-37 VEHICLE; APPLICATIONS PROGRAMS (COMPUTERS); PILOTLESS AIRCRAFT; SYSTEMS INTEGRATION; REUSABLE LAUNCH VEHICLES; REAL TIME OPERATION
Downloads: 16
[texts]Point to Point Control of the Hydrogen Mixer - Barbieri, Enrique
We continue to build on the theoretical modelling of a liquid hydrogen (LH2) and gas hydrogen (GH2) mixer subsystem. The mixer described in this work is responsible for combining high pressure LH2 and GH2 to produce a hydrogen flow that meets certain thermodynamic properties. The desired properties are maintained by precise control of the LH2 and GH2 flows. The mixer is modelled as a general multi-flow lumped volume for single constituent fluids using density and internal energy as states...
Keywords: SPACECRAFT LAUNCHING; AIRCRAFT FUEL SYSTEMS; STAGE SEPARATION; SPACECRAFT RELIABILITY; REUSABLE LAUNCH VEHICLES; SPACECRAFT CONFIGURATIONS; ASTRONAUTICS; SPACECRAFT DESIGN; NASA PROGRAMS; RELIABILITY; COSTS; AERODYNAMIC CHARACTERISTICS
Downloads: 72
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